Machine for treating skein yarn



0a. 1, 1929. N. WALKER ET AL 1,730,025

MACHINE FOR TREATING SKEIN YARN Filed A ril ls, 1927 5 Sheets-Sheet 1 M75 my Get. 1, 1929.

- N. WALKER ET AL. LZBQZbY MACHINE FOR TREATING SKEIN YARN Filed April 13, 192'] 5 Sheets-Sheet 2 Oct. 1, 1929. N. iNA Lk KER QELIAL r 1,730,925

MACHINE FOR TREATING SKEIN YARN Filed Aivril 15, 1927 5 Sheets-Sheet 5 Menfwg Get 1 1929- N. WALKER ET AL MACHINE FOR TREATING SKEIN YARN File April 13. 1927 5 Shee'ts-Sheet 4 Oct. 1, 1929.

N. WALKER ET AL MACHINE FOR TREATING SKEIN YARN Filed April 13, 1927 5 Sheets-Sheet 5 Patented Oct. 1, 1929 UN Hi2 r NOAH WALKER AND EUGENE H. DAVIS,

F PHILADELPHIA, PENNSYLVANIA, AS-

SIGNORS TO WALKER & DAVIS, INCL, OF PHILADELPHIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA MACHINE FOR TREATING SKEIN YARN Application filed April 13,

Our invention is of particular value for dyeing or otherwise treating skein yarn where the skeins of yarn are mounted on sticks in a reel or carrier and moved through the dye liquor or other treating solution or 1 bath.

One object of our invention is to provide improved means which will insure the uni form dyeing or treating of the yarn and at the same time will prevent the yarn of the sk-eins from becoming tangled.

Another object is to provide improved apparatus for moving and controlling the movement of the yarn carrier both in rotation and in movement into and out of the treating liquor.

A further object is to make our invention of a practical and durable construction which will be positive and sure in its operation.

These objects and other advantageous ends, which will be set forth hereinafter, we attain in the following manner reference being had to the accompanying drawings in which Figure 1 is a side elevation of a dyeing machine made in accordance with our present invention,

Figure 2 is an elevation showing the opposite side of the machine illustrated on Figure 1, i

Figure 3 is a fragmentary elevation, drawn on a larger scale, showing certain of the important features of our invention.

Figure 4 is a fragmentary elevation, partly in section, looking in the direction of the arrow w in Figure 3,

Figure 5 is a fragmentary section taken on the line 55 of Figure 1 illustrating a number of skeins of yarn as they are carried by the dye sticks,

Figure 6 is a fragmentary top plan view illustrating the raising and lowering means for the reel,

Figure 7 is a transverse elevation showing certain of the coupling and driving members forming a part of our invention.

1927. Serial No. 183,554.

Figure 8 is a face view of a cam forming a part of our invention,

Figure 9 is a top plan View of a trip arm forming apart of our invention, and,

Figure 10 is a side view of the trip arm shown in Figure 9.

Referring specifically to the drawings 11 represents a frame which is made up of a number of metallic sections secured together and including at opposite sides thereof, two uprights or posts 12 and 13 which are preferably made of I-beams. The flanges 14 of the posts 12 and 13 form guides for two bracket bearings 15 and 16 said bracket bearings being freely slidable upwardly and downwardly on the guide flanges 1 1 of said posts 12 and 13. Angles 17 which are secured t0 the posts 12 and 13 form stops for limiting the downward movement of the bracket bearing 15 and 16. A yarn reel 18 has its driven shaft 19 mounted in the bracket bearings 15 and 16 so as to be freely rotatable therein.

A second bracket bearing 15 is slidably mounted on the flange 14 of the post 12 above the bracket bearing 15, and the bracket bearings 15 and 15* are connected to each other by an adjustable coupling rod 20, said rod having screw threaded and nut connections with the brackets 15 and 15 as clearly shown in Figure 3. The bracket15 provides a r0- tatable bearing for a shaft 21 upon which is secured a worm wheel 22. The worm wheel 22 mesheswith a worm 23 which is secured to an upright shaft 24: said shaft having its upper end rotatable in an arm 25 of the bracket 15 and its lower portion rotatable in a bearing portion 26 ofthe bracket bearing 15. A clutch 27 is slidably keyed to the lower portion of the shaft 241 said clutch 27 engaging the clutch portion 28 of a bevel toothed pinion 29, the latter being freely rotatable on the lower end of the shaft 24;. A bevel wheel 30 which is secured to the reel shaft 19 meshes with the pinion 29, and it may be here stated that when the bevel wheel 30 rotates in the direction of the arrow y as shown in Figure 3, that it will rotate the pinion 29 in the direction of the arrow 3f, and the clutch portion 28 of the pinion 29 will rotate the clutch 27 so as to impart said rotation to the shaft 24. It will be noted that if the pinion 29 rotates in a direcion opposite to the arrow g that the clutch portion 28 will raise the clutch 27 clear of its clutch engaging surface and the pinion 29 will merely rotate freely on the shaft 24 without imparting rotation thereto.

A. cam 31 is secured to the shaft 21 and has in one face a cam groove 32. The cam groove 32 is made up of two arcuate portions 33 and 34 which are concentric with each other but slightly eccentric to the axis of rotation of the cam 31 as shown by the dot-and-dash center lines in Figure 8. The purpose of this disposition of the arcuate portions 33 and 34 will be rendered obvious from the description hereinafter set forth. The groove '32 also includes two by-pass portions 35 which join the arcuate portions 33 and 34.

A trip arm 36, details of which are shown in Figures 9 and 10, is pivotally mounted at 37' on an extension 38 of the bracket bearing 15. This trip arm has an extension 39 which is provided with a slot 40 through which freely passes a rod 41. The lower end of the rod 41 is pivotally mounted on a crank pin 42, the crank pin being secured to the hub 43 of a toothed gear wheel 44. The gear wheel 44 is rotatably mounted on a shaft 45 which projects from an extension 46 of the bracket bearing 15 The gear wheel 44 meshes with and receives rotation from a gear wheel 47 which is secured to the shaft 21 at a position between the worm wheel 22 and the cam 31.

The rod 41 adjacent its lower end includes a shoulder 48 and between this shoulder 48 and the lower surface of the extension 39 of the trip arm 36 is mounted a coiled spring 49,

' said spring surrounding the rod 41 and bearing upon the extension 39 and shoulder 48.

A second coiled spring surrounds the rod 41 at a position above the extension 39 and said spring 50 bears on the upper surface of :of the trip arm 36, said movement of the rod first being in one direction and then in. another. Due to this action, the springs 49 and 50 will be alternately compressed and, when permitted to do so by the cam 31, the trip arm 36 will be swung on its pivot 37 upwardly and downwardly as shown in the full line and dot-and-dash line positions in Figure 3 of the drawings. Said movement of the trip arm will be effected by the springs 49 and 50. Figure 3 shows the spring 50 having been compressed, the lug 53 being illustrated in a position nearly free of the arcuate portion 34 and ready, upon a slight additional rotation of the cam 31, to move up wardly in one of the by-passes 35 by the action of the spring 50.

The trip arm 36 has, at its outer free end,

a roller 54. The reel 18 on one side has a number of small shafts 55 rotatably mounted thereon, said shafts at their inner ends having sockets 56. These shafts and sockets are evenly spaced circumferencially of the reel. An outer series of skein yarns supporting dye sticks 57 are respectively mounted, at one end in the sockets 56 and at their other end are mounted in sockets 58 in the opposite side of the reel 18 as shown in Figures 4 and 5, the inner series of dye sticks 59 being mounted in sockets 60 in opposite sides of the reel. This mounting of the dye sticks is not new in itself and the arrangement can be made in any usual manner. Each shaft 55 has a star wheel 61 thereon, each of said star wheels in the present instance having four projecting fingers or spokes 62 which are evenly spaced one from another as clearly shown in Figures 1, 3 and 4. The star wheels 61 are so arranged with respect to the roller 54 of the trip arm 36 that during the rotation of the reel, the fingers 62 will engage the roller 54 of the trip arm 36 when the trip arm is in its lowered position, and also when in its raised position. In this manner, the skein supporting sticks 57 will be rotated first in one direction and then in an opposite direction causing the skeins, illustrated at 00 to be moved in the direction of their lengths first in one direction and then in an opposite direction during the rotation of the reel.

A compressed air cylinder 63 is secured on the top of the frame 11 and is supplied with compressed air by a pipe 64 from any suitable source, such for example as an air compressor not illustrated. The pipe 64 includes a two way valve 65, see Figure 2, said valve having an exhaust 66. The valve can be operated by means of a two armed lever 67 which when swung in one direction will admit air to the cylinder 63, and when swung in an opposite direction, will open the exhaust 66 allowing the escape of air from the cylinder 63 to the atmosphere. A piston rod 68 is moved outwardly when air is admitted to the cylinder 63 and this piston rod is connected to a head 69. The head 69 has chain cables 70 which are also secured to, andspirally wound on two pulleys 71. The pulleys 71 are mounted on a transverse shaft 72. The shaft 72 is rotatably mounted in bearings supported by the posts 12 and 13. Two other pulleys 73 are secured to the outer ends of the shaft 72 and have chain cables 74 secured thereto. The cables 74 extend downwardly and are connected to turn buckles 75. The turn buckles are connected to rings which surround the shaft 19, and it will be noted that if the cables 74 are raised that the reel 18 will be raised, and if the cables 74 are lowered, the reel 18 will be lowered. It will be further noted that the bracket bearings 15, 15 and 16 will also be raised and lowered in conjunction with the reel 18 and parallel with the guiding flanges 14 of the posts 12 and 13.

We will now describe the means for driving and controlling the rotation of the shaft 19 and reel 18, said means being capable of rotating said shaft 19 and reel 18 when the latter is at its lowest position and also during the raising and lowering movement of said reel.

Two toggle levers 76, and 7 6 at opposite sides of the frame 11 are pivotally connected to the reel shaft 19 and to a transversely extending coupling shaft 77. This shaft 77 extends entirely across the machine above the top of the liquor tank 78 and is preferably covered with a brass spacing tube 79 as shown in Figure 7. Two other toggle levers 80 and 80 are pivotally connected to the shaft 77 and to two small pivot shafts 81 and 81*. These latter shafts have bearings in hangers 82 which are secured to the opposite sides of the frame 11, the shaft 81 also forming a part of a gear reduction device 83 which is mounted on a shelf 84 at one side of the frame as shown in Figure 2 of the drawing. An electric motor 85 drives the shaft 81 through the medium of the gear reduction device 83 and it will be noted that the axes of the small shafts 81 and 81 are coincident.

The shaft 81 has a sprocket wheel 86 secured thereto which drives, through the medium of a chain 87, a sprocket wheel 88 which is mounted on the shaft 77. A second s irocket wheel 89 on the shaft 77 is rotatable in conjunction with the sprocket 88 and drives, through the medium of a chain 90, a sprocket wheel 91 which is secured to the reel shaft 19. In this manner, it will be noted that if the reel 18 and shaft 19 are raised vertically the toggle levers 76 and 76" will swing the toggle levers 80 and 80 on their respective shafts 81 and 81 as pivots and the relation of the sprockets and "coning 15 is coupled to and movable in conjunction with the bracket bearings 15, the skeins of yarn will continue to move alternately first in one direction and then in another during the raising and lowering movement of the to the reel shaft 19. This action causes the reel 18 to be rotated to successively dip the groups of skeins 02 into the liquor in the tank 78. Considering that the trip arm 36 is in its lower position with the lug 53 within the arcuate portion 44 of the cam 31 and that the spring 50 is under compressiomthe rotation of the shaft 19 will cause rotation of the bevel gear and pinion 29 to rotate the shaft 24. The worm 23 will rotate the worm wheel 22 and thus the shaft 21 will be rotated to move the cam 31 until the uppermost by-pass portion 35 of the cam groove 32 registers with and frees the lug 53. The spring will then expand and swing the trip arm 36 to raise the roller 54 into the dot-and-dash line position as shown in Figure 3. The crank pin 42 will then start to operate to compress the spring 49 while the arcuate portion 33 of the cam groove 32 moves to retain the lug 53 therein during the continued rotation of the cam 31. This action continues until the spring 49 has been compressed and until the opposite by-pass portion 35 of the cam groove 32 registers with the lug 53. Then the spring 49 will operate to move the lug 53 into the arcuate portion 34 of the cam groove 32 and thereby again lower the roller 54. In this manner during the rotation of the reel the roller 54 is alternately moved upwardly and downwardly at opposite sides of the path of the axes of the stars 61 and the various dye sticks 57 will be intermittently rotated first in one direction and then in another to cause the movement of the skeins of yarn first in one direction and then in another allowing uniform dyeing ofthe yarn andalso preventing tangling of the yarn which is the case when the yarn of the skeins is moved only in one direction. By having the arcuate portions of the cam groove eccentric to the axis of rotation of the cam 31, the trip arm can be swung to extreme positions both upwardly and downwardly and then slight eccentricity of the arcuate portions of the cam groove will cause the arms to be moved slightly toward the path of the axes of the stars, and we have found that in this manner it is impossible for any amming or improper striking of the fingers 62 against the roller 54 to occur. f

As will be seen from the drawing, particu-. larly from Figure 3, we find it desirable to provide a number of rotations of shaft 19 for each rotation of the cam so that there will be a number of actuations of-the complete set of star wheels in one direction of rotation before the direction of rotation is reversed to reverse the travel of the skeins.

With the proportions of the parts shown there will be approximately seventy-five star wheel actuations between successive reversals of direction of actuation.

Furthermore, by moving the trip arm 36 with a quick action as provided by the springs 49 and 50 the change in position of the roller will occur positively between successive stars 61, thereby not injuring any of the parts, and insuring a uniform action between the stars 61 and the roller 54:.

In view of the fact that the mechanism which controls the action of the trip arm 36 is movable in conjunction with the reel 18 both in respect to the rotation ofthe reel and also the raising and lowering movement of the reel, the skeins of yarn will be moved by the action of the stars and trip arm while the reel is being raised out of the dyeing liquor and in this manner, the dyeing liquor is prevented from settling at the bottoms of the skeins which has been previously found to cause streaking and improper dyeing of the arn. In other words, in addition to the fact that the reel can continue to rotate by our improved mechanism while being raised and lowered, the skiens also can receive independent or additional movement first in one direction andthen in another direction during the raising and lowering movement of the reel. Furthermore, by the improved raising and lowering means with the sliding action of the bracket bearings with respect to the vertical posts 12 and 18 accidental or undesirable swaying or turning movement of the reel is prevented and the reel is held in proper position to allow the loading and unloading of the skeins of yarn.

The speed of descent or lowering movement of the reel can be varied by adjusting the exhaust of the valve 65 to vary the speed of exhaust of the compressed air from the piston cylinder 63. In loading or unloading the machine, it it is desired to rotate the reel in a direction opposite from that imparted to the reel during operation, the same can be done, since the clutch portion 27 will merely raise out of engagement with the clutch portion 28 of the bevel pinion 29, and the shaft 24 will not be rotated.

We have specifically described our invention as adapted to a dyeing machine. However, it will be noted that our invention is applicable for treating yarn with any solution, such for example as in the scouring, washing or bleaching of skein yarn;

Having thus described our invention what we claim as new and desire to secure by Letters Patent is:

1. In a machine of the character described, a carrier for the support of skeins of yarn; means for rotating said carrier; and means for moving said skeins of yarn first in one direction and then in another direction during the rotation of said carrier in one direction.

2. In a machine of the character described, a tank adapted to hold yarn-treating solution; a rotatable carrier for the support of skeins of yarn; means for rotating said carrier to move the skeins into and out of said solution; and means for moving said skeins first in one direction and then in another direction.

3. In a machine of the character described, a tank adapted to hold yarn-treating solution; a rotatable carrier for the support of skeins of yarn; means for rotating said carrier to move the skeins into and out of said solution; and means for alternately moving said skeins of yarn in opposite directions while the carrier is raised out of said solution.

4. In a machine of the character described, a tank adapted to hold yarn-treating solution; a rotatable carrier for the support of skeins of yarn; means for rotating said carrier to move the skeins into and out of said solution; means for bodily moving said carrier into and out of said solution; and means for moving said skeins first in one direction and then in another direction while the carrier is raised out of said solution.

5. In a machine of the character described, a tank adapted to hold yarn-treating solution; a rotatable carrier for the support of skeins of yarn; means for rotating said carrier to move the skeins into and out of said solution; means for bodily moving said carrier in a straight path into and out of said solution; and means for moving said skeins of yarn while the carrier is being rotated in said solution and while said carrier is being raised out of said solution.

6. In a machine of the character described, a tank adapted to hold yarn-treating solution; a rotatable carrier for the support of skeins of yarn; means for rotating said carrier to move the skeins into and out of said solution; means for bodily moving said carrier in a straight path into and out of said solution; and means for moving said skeins of yarn while the carrier is being raised out of said solution.

7 In a machine of the character described, a tank adapted to hold yarn-treating solution; a yarn carrier rotatable within said tank; means for hoisting said carrier in a straight path out of the solution in said tank; and means for rotating said carrier while in the solution of said tank and while being hoisted.

8. In a machine of the character described, a carrier; means for moving said carrier; sticks on said carrier for supporting skeins of yarn; means for rotating said sticks first in one direction and then in an opposite direct1on to move sald skeins of yarn first in one direction and then in an opposite direction during said movement of the carrier and means for reversing the direction of rotation of said sticks.

9. In a machine of the character described, a carrier; means for moving said carrier; rotatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to said sticks; tripping means for engagement with the fingers of said stars during the movement of the carrier reversing mechanism for moving, said tripping means alternately into positions at opposite sides of the axes of rotation of said stars whereby said sticks are rotated alternately in opposite directions during said movement of the carrier to impart movement to the skeins of yarn first in one direction and then in another direction.

10. In a machine of the character described, a carrier; means for moving said carrier; rotatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to said sticks; tripping means for engagement with the fingers of said stars during the movement of the carrier; controlling means for said tripping means operative inconjunction with said carrier; and means operative to move said tripping means into positions at opposite sides of the axes of rotation of said stars when permitted to do so by said controlling means whereby said sticks will be rotated alternately in opposite directions to impart movement to the skeins of yarn first in one direction and then in another direction.

11. In a machine of the character described, a carrier; means for moving said carrier; rotatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to said sticks; tripping means for engagement with the fingers of said stars during the movement of the carrier; controlling means for said tripping means operative in conjunction with said carrier; and reversing mechanism spring-operative in one direction, effective to move said tripping means into positions at opposite sides of the axes of rotation of said stars when permitted to do so by said controlling means whereby said sticks will be rotated alternately in opposite directions to'impart movement to the skeins of yarn first in one direction and then in another direction.

1 2. In a machine of the character described, a carrier; means for movingsaid carrier; rotatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to said sticks; tripping means for engagement with the fingers of said stars during themovement of the carrier; a cam :tor controlling said tripping means operative in conjunction with said carrier; andv means operative to move said tripping means into positions at opposite sides of the axes of rotation of said stars when permitted to do so by said cam whereby said sticks will be rotated alternately in opposite directions to into positions at opposite sides of the axes of rotation of said stars when permitted to do so by said cam whereby said sticks will be rotated alternately'in opposite directions toimpart movement to the skeins of yarn first in one direction and then in another direction.

14. In a machine of the character described, a carrier; skein yarn-supporting means on said carrier; a cam; tripping means controlled by said cam, said skein yarn-supporting means having aportion-for engagement With said tripping means; and means operative to move saidtripping means when permitted to do so by said cam whereby said skein yarn-supporting means will be moved alternately in opposite directions to move the skeins of yarn in opposit'e directions;

15. In a machine of the character described, acarrier; skein yarn-supporting .means on said carrier; a cam; tripping means controlled by said cam, said skein yarn-supporting means having a portion for engagement with said tripping means; and spring-opera .tive means effective to movesaid tripping means when permitted todo so by said cam wherebysaid skein yarn-supporting means will be moved alternately in opposite directions to move the skeins of yarn in opposite directions.

16.. In a machine of the character described, a carrier; means for moving said carrier; rotatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to saidsticks; a pivoted trip, arm

having a portion for engagement with the fingers of said stars during the movement of the carrier; a cam for controlling the pivotal movement of said trip'arm; and springoperative means efl'ective to swing said trip arm on its pivot when permitted to do so by said cam whereby said finger engaging portion of the arm will be moved alternately in positions effective to cause rotation-of ,said stars in opposite directions and thereby cause the skeins to be alternately moved in opposite directions. 7

17. In a machine of the character described, a carrier; means for moving said carrier; ro-

tatable sticks on said carrier for supporting skeins of yarn; actuating stars operatively connected to said sticks; a pivoted trip arm having a portion for engagement with the fingers of said stars during the movementof the carrier; acam for controlling the pivotal movement of said trip arm; and springoperative means effective to swing said trip arm on its pivot when permitted to do so by said cam whereby said linger engaging portion'of the arm will be moved alternately in positions efiective to cause rotation of said stars in opposite directions and thereby cause the skeins to be alternately moved in oppoposition directions; means coactive withsaid trip member to alternately move said skeins in opposite directions by engagement with said trip member; and means for alternately placing said springs under tension to eitect said movement of the trip member.

19. In a machine of the character described, a carrier for supporting skeins of yarn; a pivotally mounted trip arm; a cam; said trip arm having a portion for engagement with said cam; a rod; two springs on said rod and bearing against said trip arm; means for alternately placing said springs under tension to efiect swinging movement out said trip arm when permitted to do so by said cam; and means coactive with said trip arm to effect movement of said skeins alternately in opposite directions.

20. In a machine of the character described, a carrier for supporting skeins of yarn; movably mounted trip arm; a cam having a groove inluding two arcuate portions joined by two by-pass portions, said trip arm having a portion extending into said cam groove; means for rotating said cam; spring-operative means adapted to move said trip arm when said portion thereof alternately registers with said by-passportions of the cam groove whereby the trip arm will alternately be moved into predetermined positions; and means for moving said skeins of yarn alternately in opposite directions by contact with said trip arm when in said predetermined positions.

21. In a machine of the character described, a carrier for supporting skeins of yarn; a movably mounted trip arm; .a cam having a groove including two arcuate portions joined by two by-pass portions, said trip arm having a portion extending into said cam groove; means for rotating said cam; spring-operative means'adapted to move said trip arm when said portion thereof alternately registers with said by-pass portions of the cam groove whereby the trip arm will alternately be, moved into predetermined for rotating said cam; a. rod; springs on said rod bearing against said trip arm; rotatable means having a crank, said-crank being connected to said rod whereby when said rotatable means rotates, said springs will alternately be placed under tension to cause said trip arm to be swung alternately into different posit-ions when said portion of the trip arm re 'isters alternately with said bypass portions of the cam; and means for moving said skeins alternately in opposite.

directions and effected by engagement with said trip arm when the latter is in said alternate positions.

' 23. In a machine of the character described, a carrier for supporting skeins of yarn; a pivotally mounted trip arm; a cam having a groove including two arcuate portions of diiierent radius joined by two bypass portions, said trip arm having a portion extending into said cam groove; means for rod bearing against saidtrip arm; rotatable means having a crank, said crank being connected to said rod whereby when said rotatable means rotates said'springs will alternately be placed under tension to cause said trip arm to be swung alternately into different positions when said portion of the trip arm registers alternately with said by-pass portions of the cam; and means for-moving said skeins alternately in opposite directions and effected by engagement with said trip arm when the latter is in said alternate positions, said cam being rotatable in conjunction with said carrier.

24. In a machine of the character described, a carrier for supporting skeins of yarn; a pivotally mounted trip arm; a cam having a groove including two arcuate portions of different radius joined by two by-pass portions, said trip arm having a portion extending into said cam groove; means for rotating said cam; a rod; springs on said rod bearing against said trip arm; rotatable means having a crank, said crank being connected to said rod whereby when said rotatable means rotates, said springs will alternately be placed under tension to cause said trip arm to be swung alternately into different positions when said portions of the trip arm registers rotating said cam; a rod; springs on said alternately with said by-pass portions of the cam; and means for moving said skeins alternately in opposite directions and efiected by engagement with said trip arm when the latter is in said alternate positions, said cam and said crank moving means being rotatable in conjunction with said carrier.

25. In a machine of the character described, a carrier for supporting skeins of yarn; a pivotally mounted trip arm; a cam having a groove including two arcuate portions of different radius joined by two by-pass portions, said trip arm having a portion extending into said cam groove; means for rotating said cam; a rod; springs on said rod bearing against said trip arm; rotatable means having a crank, said crank being connected to said rod whereby when said rotatable means rotates said springs will alternately be placed under tension to cause said trip arm to be swung alternately into different positions when said portion of the trip arm registers alternately with said by-pass portions of the cam groove; and means for moving said skeins alternately in opposite directions and efiected by engagement with said trip arm when the latter is in said alternate positions, and adjusting means on said rod operative to vary the tension of said springs.

26. In a machine of the character described, a carrier for supporting skeins of yarn; a pivotally mounted trip arm; a cam having a groove, said trip arm having a portion extending into said cam groove; means for rotating said cam; a rod; springs on said rod bearing against opposite portions of said trip arm; a wheel having a crank, said wheel being rotatable in conjunction with said cam, said crank being connected to said rod whereby when said wheel is rotated, said springs will alternately be placed under tension to cause said trip arm to be swung alternately into different positions when permitted to do so by the cam; and means for moving said skeins alternately in opposite directions and effected by engagement with said trip arm when the latter is in said alternate positions.

27. In a machine of the character described, a rotatable carrier for skeins of yarn; bearing means for said carrier; tripping means effective to cause movement of said skeins alternately in opposite directions means providing a bearing for said tripping means; means for connecting the bearing of said tripping means with the bearing means of said carrier; and means for raising and lowering said carrier whereby said tripping means will be raised and lowered in conjunction with said carrier.

28. In a machine of the character described, a rotatable carrier for skeins of yarn; bearing means for said carrier; tripping'means effective to cause movement of said skeins alternately in opposite directions; means provida bearing for said tripping means; means for connecting the bearing of said tripping means with the bearing means of said carrier; and means for raising and lowering said carrier whereby said trlpplng means will be raised and lowered in con unction wlth sald carrier, said connecting means between the 

